linux-kernel - Re: [PATCH 1/1] driver:mtd:spi-nor: Add Micron quad I/O support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 26 Sep 2014 10:46:07 +0200
From:	Marek Vasut <marex@...x.de>
To:	bpqw <bpqw@...ron.com>
Cc:	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	"shijie8@...il.com" <shijie8@...il.com>,
	"geert+renesas@...der.be" <geert+renesas@...der.be>,
	"grmoore@...era.com" <grmoore@...era.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] driver:mtd:spi-nor: Add Micron quad I/O support

On Friday, September 26, 2014 at 10:39:38 AM, bpqw wrote:
> >> +	/* set EVCR ,enable quad I/O */
> >> +	nor->cmd_buf[0] = val & ~EVCR_QUAD_EN_MICRON;
> >> +	ret = nor->write_reg(nor, SPINOR_OP_WD_EVCR, nor->cmd_buf, 1, 0);
> >> +	if (ret < 0) {
> >> +		dev_err(nor->dev,
> >> +			"error while writing EVCR register\n");
> >> +		return -EINVAL;
> >> +	}
> >> +
> >> +	if (wait_till_ready(nor))
> >> +		return 1;
> >
> >Why does this not return proper error code or even better, return value
> >from wait_till_ready() ?
> >
> >Other than that, there's nothing wrong with the patch I think.
> 
> Hi,Marek
> Thanks for your review,you can find the same usage in the spi-nor.c.
> Below method is OK? Or you can give me some suggestion.
> 
> if (wait_till_ready(nor))
> 	return - EINVAL;

ret = wait_till_readynor()
if (ret)
 return ret;

But all right, this means the subsystem isn't perfect. Well, others, what do you 
think ?

Best regards,
Marek Vasut
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/